Adding attachment for typewriting machines



1,624,318 G. O. DEGENER Y Filed MarchS. 1925 8 Sheets-Sheet 1 April 12'. 1927.

ADDING ATTACHMENT FOR 'IYPEWRITING MACHINES April 12, 1927.

G. O. DEGENER ADDING ATTACHMENT FOR TYPEWRITING MACHINES Filed March 9, 1925 8 Shee's'JShe-t 2 A ril 1927.-

p l2 G. o. DEGENER ADDING ATTACHMENT FOR TYPEWRI'l-'ING MACHINES Filed Marsh 9 1925 ,lverar me ena' @his firne s vr8 Sheets-Sheet s 1,624,318 April 12 1927 G. o. DEGENER ADDING ATTACHMENT FOR TYPEWRITING MACHINES Filed March 9, 1925 I 8 Sheets-Sheet 4 April 12, 1927. 1,624,311;

G. O. DEGENER ADDING ATTACHMENT FOR TYPEWRITING MACHINES Filed March 9. 1925 8 shets-sheef 5 April 12;;1927.

C O. DEGENER ADDNG ATTACHMENT `FOR 'TYPEWRITING MACHINES Filed March 9. 1925 'l 1927. Ap 12 G. o. DEGENER ADDING ATTACHMENT FOR TYPEWRITING HAC-EINE; I

Filed Marcha. 1925' A 8 sheets-Sheer. 7

` L\ QY 18.' a

gg v N N N A v o l@ l N fl N @z han", "im". I

Apri! 12 i927.

G. O. DEGENER ADDING ATTACHMENT 'FOR TYPEWRITING MACHINES Fnd Maron e. 1925 8 Sheets-Sheet 8 Patented Y Apr. 12,v` 1927.l

UNITED STATES 1,524,318. BUEN@ QFFICE.

GUs'rAvE o. DEQENER, oF BRooKLYN,'NEW YoRn, yAssIvyNon ro ROYAL TYPEWBITER eolilrPAlyTY,` INC., F NEW YORK, N. Y., A'CoRPoRATIoN oF NEWYORK.

'i ADDING ATTACHMENT Fon 'rvr'swnflf'ING1, 1'ACHI1`TES-I -rv Application led March 9, 1925.

My invention relates primarily to an adding attachment for typewriting machines ot' the generalcharacter shown in my prior application No. 736.896 filed Sept. 10,1924. Portions of the mechanism are the same as shown in my prior case. and will not be described in entirev detail herein.

The invention is embodied in an attachment which can be readily attached to and detached from the frame of atypewriting machine, and requires substantially no change in the construction of the typewriting machine. The adding mechanism is operated only when the carriage ofthe typewriter enters the adding; zone and: maybe easily disconnected from the carriage so that writing'may be performed'in the adding zone'without operating the adding attachment.l Itis` located at oneside of the typewriting machine and .does not obstruct the linel of sightto the paper nor .interfere in any' way gwiththe usual 'ioperation :of Athe typewriting instrumentalitiesf i -While it is illustrated as applied'ito the Well known Royal'Standard machine, 'it is to vbe understood thattheattachxnent may be appliedto-:any'of the standard commerciali machines,:only uninor changes inthe connections being required. .and none in the structurei ot the adding. mechanism itself.

This computing. attachment is designed primarily 'for billing purposes.'- and can be employed wherever this .classof ":workl is to be f performed. #Int making' out such bills .or statements," the various items. .are written cacli'withdate,' name of`a1ticle .etc.. and the carriage is then moved .preferably vbfy tabuzlatingl mechanism; to the firstcomputing zone Wherethe vSeparate ax'nountsare Written, one under the other. At 'thistme vthese amountsare-set up'in the column-totalizer, the figures-of which at any time willA show the sum of the detail items Written.

W hen the billisfinished, it is desired to write the total in 'a'lsecond column', andthe carriage is moved to bring the paper into position towrite the. sum-in this column-and also *bringthe carriage',intothe second computing zone. The sum is then written, being copied. 'from the figures appearing in the column totaliaer and the carriage is returned to initial position. to beginvwriting of the succeeding `bill'.

In computingmachines previously employed ,for this l.class of work, there have serial no. 14,315.

l y been numerous chances of error, which have caused objections thereto. It has been ordinarily necessary to move a-lever to subtract position'upon lWriting the total, at= which time the column totalizer is usually' cleared and at the same time the sum isfsetnp inl tliegrand tot-alizer.` `It frequently happens that the operator forgets to movie-the lever to subtractposition, which results *in the amounts appearing in both totalizers being wrong. n. l l l In my previous application. I overcome this objection to a considerable extent by rendering it impossible to return the carriage to position to begin a new line of Writingfuntil the vtotal has been' correctly copied and the column register cleared. This mechanism, While overcoming any objections to prior constructions, nevertheless did not prevent t-he error but merely -renderedfitz'necessary. tol correctA the samev before continuing with .the succeeding bill.y .5' r

An object f my present inventionvv is to prevent thev occurrence ofgany sucht-errors. Accordingly the: mechanism comprises means .whereby when the :carriage is moved into the second computing zone andi' the general totalizer brought into -register vWith the master wheel; it is. vimpossible to -write ,any figuresfex'cept .those appearing in the-column .register and isi impossible to Writefthese fi gure'swin any except the corrcctdenomina- .tionalpo'sitions This construction precludes thepossibilitjr otanferror arisingwhert the total is written.'

l; :The secondsfimportant feature ofmy invention- -relates to meansv forA clearing the column totalizer after the sum` has" been written and a number set up in thefgrand totalizer. This comprises means fwhereby after the carriage-has been vmovedinto the Second computing zone and a; number. set up in the grand totalizer,g the return movement of the carriage itself will` automatically clear the columntotalizer -Withoutanyx attention upon the operators part. The writing of a. total and the subsequent clearing of the totalizer, therefore, takes place without the movement of a-nylever to subtract position or wlthoutthe actuationiof 'any special means whatever for the purpose of clearing the column totalizer.

, further featureof the invention relates to the indicator which will show at all times what digit has been added andin which denominational =pos`ition this?,l stands; This is important because it frequently hap'- venSi-thatvw .Operatoriivill depress key finris-uiai-eiit-foffeio bac-,engugh to actuate ffie'a'ddiig the digit in the register?, Even. i..,the .,Qper7V ator realizes the pssibilityof 'ineorect operation, it is unnecessaryatmpausefand make a mental computation to see whether the-.fnu'lb'er fnot'p'r1nted has..been 'entered' into .-thezooluinn" totalizei'. OThe indicating. means-whi'clris Aembodied ini this invention shows as'feabhf key. 'is struck-'whether -or' not i'twis- 'printed 1whether; ori .-not thefdigit has been .entered into the'ztotaflizenin th'e proper postion '.flhis'obviat's thesir'eceity-of full strokeameehanisnr for downward movemntfof tlie keys and' enables the operator to know what lamoutrwasientred Ain the reg1ster by the last key operated. .'Ainother ffeatre. of. theinvention: consists in? the -provisinrofa spring-wl1iclrdaws the travel-ing :registers sf'rin L nightto yflft' in- (hpenilenh'of -the conn'ection"between the eg'zisterqmcl: the typewritr'zzearriag; This isr or th'puipose-o lelievingi the by steprfniovmentf 'off tlie i 'tyfpewrit'r carriage -rornz thea added resistance :ieaused -rby the connectioivthreto of thief-adding mecHanism.

Itlhas't been-"fundf proferblertoi throwthe increased strain uplil fthe'4 Ymoiexi'ent of the typewriter canfiagerralthertlian 'upon .the'i'step rby '.stepmo'vementnthel'eof;'= Accordinglyffmeans -is proidedr'frfholding tl1`e 'register vin'iits extreme right .hahd -poslti'on during the? time rthat it: isgatmnaticallydis- 'connected from-the typwriterfcairiage.'

` movement is stopped. Theffnpertdr Ewig the complete'f depression'j Whilef 1in the other -t' -A prevnb'r a. 'complete refgnothr' objectief-the inyent-ion is tofpo- "vide special means" for properly aligning 'th'e varnusfiegsfer'j wheels' especially after' an extended automatief carrying "joperatipn, Whenever' n- 'extended-envia bpera'tion fram-wheel wfiviferdae iafchqpiay allowed in each set of gleasf, therefore; when alarfge in its proper position. Means is therefore provided frcoirectly certain of' the carrying whels or other elements of the traino f,a gearing 1n order vto prevent the jppos'siljility' onf anyus'uch" erroneous operation.

Various other objectsof the invention will igmse@'isf affrtviewo a portion of the .mechanism shownfn Figure'- 3.

.-Figuire'i :isemtop plan' view azithpar-ts in sectiopziofftliefdttachmentzwitlr the itraveling iegiste tand actuating parts removed.

'Figaii'- 6 isa 'fore and aft vertical section .tn'lteivon 1the 2linej|6-'6 =of-Y Figure 5.

uEig-re?? -isa'rier View' taken atan angle ofaabbu't'vtfwshowing thel mechanism -or )Iggster 'to- :hox'n'e'rpositioirv und retaining it tlierinvhendisconnect-ed from ./cle cariagejf FigureS is frperspective view of one of theainrilizyindicators. A i9; isa foreand aft section showing the registerA ad trainof connections for actatingi the same- Fi uref .'l" 'sf a'- :detail lViewA of 4the -master whee shaft togetlfer with tlietcams1for lock- :igfl and unlocking :the'carrying wheels.

"Il Fiigireffll `is"ai'longitudinal sectionof a modification bf?A the error check mechanism 'shbvingonlysuch parts as are necessary to disclose wherein the construction differs from t'h'efixstfform.

Figure 12 is a top plan view of a portion of this modifioation'correspon'rling in genline-*13.211301* Figure l'looking in the dircction of the" arrows.'

'Figure let is a sideclevatio'n with 'parts in "Section" of th-spcial alinin'g; mechanism. "Fig'nre'l'is afroht View. of the sanic. The lirlventhf lias=v .been illustrated in` conm-'sction'withl RyhlwStzandard machine althe 'variousv commercial typewriters. l`hc structure 'forms no part oftlie inyention.

mechanism D, ribbon mechanism E, and

(Iii) keyboard F providedl with numeral keys G' having levers GJ T.All ofthese parts may beo1any..-suitable or 'desired construction.

- 1 Theattachment fprop'er comprises a casing the frontportionro'f/which isnarrower thantheizrear' port-ion," said casing being formedliy a"left.-;hand..side lplate2, an in termediate;gplateiagl.- `which i forms the .right side of the front narrow portion, and i.a rightfhand.sidexplate 4. These platesiare tiedtogether(seerigure' 6;)r=by tie rods 5 aiidt; lby rear-transverse member .7' 'having shelves' 8a1idi9,by a -fmnt transverse membe'r lzhavingfafshe-lf lil', and'byrods 12 and 13' lupoir *which the: :register travels. There isalso provided a.to"p;.=and.\front plate 14 and bottom jlplatelll. .rAt' the .top rear, por# tion the;y registerfsrame fis e attached to the typewriter` franie; byfsc'rews; 16 and-v 17. (.see ligllrsiAt'fthe ffront thereis-attach'ed to the .f bottoml plateffl a trouglr shaped. plate member 2185.(see Figs. Il; 5 :-and";6) 'which extends under thekeyboardrof a typewriting machineiiand isifastened: thereto; by screws` 19. :i It'= is;v therefore, apparent? that the attaclm'ient-mayfbe rremo'i-*ediby merely removingscrews-ltS-? and 1'9v and disconnecting the 'imineralley:- lexzers'rom the mechanism operated therebyJf'r-'v j 'u'fy 1 Suitably s upportedtinithe trough of the plate '18 and underlying a portion of 'the typewriterkeyboaild :F is 'afseriesof ten roel: shafts 'Ipositioned vin vertical pairs.' Each rock shaftiisproifided'atits left end with a rearwardly extending' crank arm 21A-connectedibyga' 'link 22 ,to .tlfe corresponding key lever Gr'.' "An" upwardlyextending crank arm 23is" attachedto .the 1 right hand end of'ea'ch rock shaft andthis crank arm is pivoted at its upper end to a sliding bar`24. It'will be vnotedtliatfthe cranlearms 21 and 23 -are so arranged .that the proper movement will be given to the bars 24 notwithstanding the fact that some of the rock Shafts 20 are'arranged farther from thc key stems G'tlmn the others.

At their 'rear ends the hars 24 rest. on a rod 25 (fsee Figure) and Aare guided hy a comb 26 formed of apiece of sheet. metal bent Ttosubstantially' surround the rod 25 and provided with an upwardly 'extending slotted 'edge portion. The transverse member 10 supports a sheet. nietal member 27 which is slotted to Aform a series of fingers bent at their lower end to torm a. substantial cylinder 28, (see Figures' and 6). Balls 29 are placed in the cylinder and held by stops at the ends thereof so that there is just enough play to permit'the -passageof a-depending projection 30 on the hars 24 through its corresponding slot.' ilhen one keyr is depressed and itsuconnected bar 24 moved until the-projection BOpasses between two of the series of balls 29,' it is impossible to depress a second key lever at this time.

The extreme rear end of the arm ,2 4 has a lug 31 which contacts withhtherod 25 l,to limit the, return movement of the,barvandV also has an additional function tobedescribedlater. ,The rear portion of the bar 24 is provided on its upper surface with rock teeth B2 which actua-tea train of mechanism about to bev described.

The train 'off mechanism; actuated har 24 tor setting -up -in the register` the digitv f" corresponding to the key depressedzis s im i; lar' in .its main features to-that ofIlly'- PIOI`- application' and Will-- be hdescribed .mainly n'itlirefercnce toFigure 9. wf'

There.arezpro'ided a seriesffofcam:gearsA 323 mountedon acamshat-34,;each oiwhich. gears -11as',:teetlr';35 .adaptedito meslriwithi the teeth 432j of. the? corresponding -bar Each .ofjthe'se gears alsojihis -.a;.series -of teeth 36 varying .'in :numberaccording to the denomination I oi the :key lever,adaptedl to actnate. the-same. 'On'on'e .sidefof leach cam 'gear ..33 are :positioned cams` 37 and i38 for a purpose-hereinafter described.-,... l

Located above the cam gears .is afshaft 39 on which slides and rotates-a sl eev e.i40 carrying an elongated pinion-'nearoneend and a series of unitpiIiionsf.41.as-in.-;my prior application., The unit 'p'nions-are nor mally out o position to 'meshljwit-h;the-teeth of theA cam'geais, but are 4moved-:into alinement. therewith by -the first'. fportioni f he movement of Ithecam .gear.q..gThis:is brought .aboutin the following ma1mer. Mounted on the shelf5Sfbyf-ineans'ofa screw 42 is' aplate 43 having oneuendf bent to vform :1n eye 44 inwhich'rotates: 2.,:stud 45 supporting a-pawl'member/. `-A link-.47 connects the member 46 with. :infirm-'480i a memberz49 having aU shaped bearing-on a pivot 5 0 which :is mounted at=its upper end in the plate 43 and at its vlower ciid in an Voar 51 offset fronrsaidplate 43. A meraher 4S)5 has a forwardly extending' arm'- 52 telminating in a rounded end 53 which en? .gages between the elongated pinion `and the adacent unitpinion 41. A.()bviously when the paw] member 4.6is rocked the member '49 will-he rocked about pivot and the sleeve 40 will he moved lengthwise 'to hringl'tlie unit pinons intoV position to mesh with \\'hiche\'er'or the cam gears 33is operated. The rocking movement is transmitted to' the pawl member 46 in the ollowing'manner. l

A sheet meta-l member' 53' has one edge wrapped around a rod 54 supported .in frame members' 2 and?. The. other edge 55foccu pies the position shown in Figure 9 a'n'dis engaged b y the cam 38 on any one -of `the cam gears 33 when it is rotated. This rod 54 has a crank arm 56 which carriesaroller 57 at its end and this roller is adapted to enga-ge the lower rearwardly Aprojecting end 58 of the pawl member 46. Whenever a key is depressed, a earn gear 33 is operated and the-canr3'8 engages the lip or. edge and rotates the member 53 in. clockwise di-1 rection and throughthe-engagement of the roller 57-with the end 58 of the pawl member 46 will -rock saidlpawl member. As Soon as the cam 38 passesl beyond the lip or edge 55, thefpawl. member-46 isreturned to normal position by a. spring 59 attached at one end to= the -pawlV member and at iits' other end to an upturned' lug 60 on the plate 43.

`The cam `38 hasnotches 61 in its edge facing in one direction. On the down stroke of the key when the memberis rocked in clockwise direction, there will be'no .locking engagement between the edge 55 and the notches 61. On .the u stroke ofthe key, however, the opposite e ge of thecam member 38 comes into contact vwith the lip 55 and rocks the member 53 ,in counter-clockwise direction. During this movementthe engagement .of the lip 55 with notches 61 will act to prevent a second-depression of the saine key until it -has returned: fully to normal position; :1n eflect` this -is 'a Vfull stroke mechanismv which acts only'during the return movement .of thekeys. Duringl this counter-clockwise movement of the member 53, the roller 57 engages' thel endof a lever- 62 which is pivoted atu63 -and normally drawnv by .a -springf 64. against a. stop: 65. This-operates toreturn the member53 to normal position after the depressed'. key has returned to itsnormal position. Underlying the roller 57- but in a different? vertical plane from the lower end 58 of' thelever 46 is the'end of 'a disconnect lever-'.66 Awhich when operated. engages said; roller 57. and thereby moves* the member-53 in counterclockwiser-.directin and -by moving-the .edge 55 out of position to'beeng'aged by the cmn 38 allows .the cam gears to be operated idly without operating the= cor'npnting mechanism. This constructionI :.is substantially that of myprior application and;is used for disconnecting the computing .mechanism when the carriage is out ofth'encomputiiig zone. The parts are= returned to normal position after this actuation-bv .the lerer 62 above described.

It may be noted at this. point that the pawl member 46has a rearward exte'nsi'on 67 adapted to overlie one of a pluralityx of tixed projeotions68- wlielrthe carriage .is -in the position'for'writing thecomma or 'the period ina number tot bewwrittenf-@Ths prevents the Aope-'ration ofV the xpawl.- A member 46 when thecarriage stands in such positions andby' locking the wholez trainsof connect-ions; prevents the depression 'of the numeral keys at -these fnoints.

A plate 69 fixedtoltheshelflL 4has one edge divided into; lingers which are turned at theirends toform eyes ,in-whichis supported a-.sha-ft 70" upon which are pii-'oted a series of un'itpimoh-pawls 71. The tail of each of these'pawls is weighted toe hold the nose thereofout of engagement with Oits' corresponding un'it .pinion 41. The pawl is provided withl a-eprojection 7-2 which is engaged by the cam- 37=uponi the-rotation of the cam gear-33 to movethe pawl 7'1 into engagement withf the correspondingnnit pinion.

The unit pinion 41 when moved by the act-.uated cam gear transmits motion through gears 734 and 74 tomaster. wheel 75 which is normally held by the nose ofthe pau-l member 46. However, at this time it will be apparentffrom the above description that the pawl member has 'been rocked to release the masterA Wheel; 75 and leave it rec to be moved bythe .unit pinion. The gears 73 and', 7 4 form parts ofmea'ns for determining in whichxldirection themaster wheel shall turn and consequently whether addition or subtraction shall take .'place. This mecha.- nism vis .not show'nin detail as -it= is or may be the same-as that-described fin my 'prior applicationor other-.equivalent gear, shift- 1^ train .comprises a'nfmdex wheel.79 m ounted on a Ashaft-:;'aiflnock geanSl carried by a lock gear-'levenvpivoted on a rod 83, a dial wheel 84f-mounted `on. shaft 85 and havingiagear 86;,meslii`ng withga-.dial intermecliatef 'eai-'''which is Amounted on a shaft 88 an ials: meshes' with th'endex wheel 79. 'Ilhis t-rin 'oge'ar being the same as that shown AinJn'y prior application' and 1n itself constitutingnno; part; ot the present invention n'eedzmot'zb f-u'l'ther described. There are certain differences of construction which form a artl of :the present invention. The comb p ate-89 has oneedge, pivoted into fingers 90 coiled about the shaft 83 tospaoe the Vlockgearlevers and its other edge `plvote'd intov fingers-91 which are bent.around theshait 85 in the spaces between the total- 'izer wheels.; Obviously -thesefingers can only -be positioned inspaces corresponding to the connna vand period =in -the -written- :number. Anotliercomb. plate-92 has one. edge pivoted intogingers 93 which arel bent around the' sha-ft '80. in -order tospace theA index wheels.79 and its other edge p ,ivotvedinto fingers 94 which areV bentaroundfshaft 88 in order to properly space the-dial .intermediate wheels. I- find thesecomb plate constructions .preferable Atotheusualspacing washers both on 'account of Simplicity and cheapness o-constructionaud .because it is i211 bell crank levers andare spaced n the bar. i95.

in; meshg' with: .the master:

possible to' vobte-in Vgreater-'1v accuracy: with much 'moreeaseu z; 'Carried byatransverse.bar 95'ofthe1rnvs eling register is a comb plete 96 having; slots 5 which giiide extensions from'thelockigeal; levers 82; Also carried by the .bar 95;is.. a second comb. plate 98 vhaving a bent -slotted portion: 99;which guides the loweriendsof the 1evers'82. These levers 82. are in effect on the shaft 83 by the comb fingers 90 :1nd have. both arms of the bell crank guided.' by combs 96 and 99, respectively. Mounted on the shaft83-is n series of l5 defent levers 100, each having.. a. detenttooth 1.01, an offset free end 102,. andanangular extension` 103. Euch-extension is normally pressedlv-ngainst the comb Aplate;. 98-by a spring finger 10ft-.0'1" a. -plete 105V fastened to Thesedetent levers do. notl engage the .lock gearlevers normally, but when the-'lock lgear levers r:1re movedout of engageinent with the index wheels -or from .the-Figure' 9 to the Figiire 3 position, they :f5 move into; engagementfgwith theA detent levers and' are held against; displacement. vThe oisetgends 4v102, ofthe .detent levers; are guided byf 'the .c olnb 99, and lie-in the.slots of. this;co1 nb.abov.e; theends of4 theleveiis 8 2.

totalizer -mns't ,be in mesh with; theirjl correepondlzlg -,-i ndex ivlieelsewhler-ae number .51S being- -w'vrtteni ,exceptthat the 'loek geur .eorreslpending' .to Ithe. e. index/:wheel whisk). -iS wheel' .eo any' given time, must, be.. disengaged, f- Io1n its index wheelsi .,-,Als.0 due tof. olea-ring the. Column :registelbv the return movement of th. e'.f,-ee1:ri ege., its- :peces-Serif .en rsgot thexeolumritotelizer be disengaged maine suoli-.returnevenement. =liioreoee1fw1ie1i ..tl1ef look.igeen .ot-gei'thel' totelizet ere disengaged, :there mette" some meme-oi holding; the .vereine-,tof geering f rtf' s rguinst f accidentali; 1displecement. Ifhe construction .bye .wht lnth .Bhe y enter. ,portions gt -each of. these h ld. thorn in proper posithe wheels.v

:eedfthe @b oeegegee of, the column.Y register as the corresponding 'lock ge'firszire disengaged Not hedz washers ,111. 1nd

-Carried .by thefshelf 9;, of y the register franiesare. t wo camf.members- 1134 and 114 of .ztheforni; shownin Fignrjes, 10i and 3'. Eachcam comprisest.v straight portion and the ends of, one stright portion are-bent in u ,direction opposite to theends-of the other straight portion( The bent endllof the cam. 114 is flexible fone pur-pose herein? utter mentioned., The straight portions lie in parallel planes which are spaced by a distance slightly; ,less. than. thewidth of the urm-97 of the locklever-pawls 82.

X/Vhen the registerlies in-home position at the. extieme righthand side, the trainsof gearing of the-grand totalizerwill substantially register withthe ribllO. and the index wheelsof these trains. will be engaged thereby.l 4'lheends 973;0; the 1ock gears'corre sponding to the wheels of the column. totalizer will lie on thenppei sideof 'the cam 114 :1s indicated in Fignre 10.. Asthe legister begins its movement towards theeleft, the first index wheel comesiinto 4engagernent with the j .lna'ster wlleeL and is; operated .thereby. Upon t l 1e next steptotheleft the extension 97,'iofgthef locki-,gearileverr corresponding to the indexwheellwhich .has ]ust been-f actuated', comesgintogcontact with the under surface ofthecainlland is moved .to i oeus'etlieilo-ok. geer tor-:engage with. ,the inde-.2.1; wheel-z AS thegoolumn. i register-f .continues toi move; Smoby-.Steptonethe' left, e.eeh:...s.u.ooeeflngf leek. geef.,- .is'ifmovedi into engagement .nithfvitendex wheeL, thosrermitting f @bei neeeseeny eenling! operations to; herprop-erlxexeouted.; 15.21;.- Aften theseries o.items. has been writtenr and. reoorded i.n the .column totelizer and the regeter meohanismaismovledito the. left opostionto being-fthe enditotelifzer in- Ao.; operative; .rel'ationto le master.;Wheel o simile-.n operatonitekeS-fpleoe as'regardsthe lock 'levers corresponding to theiindexrwheels f o f. this. totalzer-wAt :the Seme timethei jn- .des iwheelsfo :the column .totelizer-.ere mov ing into engagement with,- .the rib',109 and aref held againstfdisplacementzwhile.the extensions 947-. f -;t l1e' lock gear levers 82 fpass `to the leftoi the; cam llgtherebydocking f the indexi .wheel byf eanetlOQf instead of indireetly-.throilgh.cam 113Mo auf ,i -.On- -t-he.i retornsmovementf f.. the; register toward. the 'right-111e extensions-..97 of the zglocli, gear; levers successively; (strike. the-bent endll. of the ca m .114: andlrde upon the-upfp en surface; of this Icafrn: thereby-disengagng from the-index .wheels permittin .the index .,-siderableg speed', and itis desirgbleto have :t certeln yielding. 1n order .to avoid :excessive wear due to extreme speed.A

:ft willibenoted. thatet certaritimes the lock `gear levers are disengaged 'while the indei: wheels are at these-me' time out. of regi? ister with the-rib'sf11().fl 'At this time accidental -displacementf offvthe' trains of .gear-.ings is prevented -byl mechanism show-n in Eigureiywhi'ch comprises arod 116 engaging allE oftliein'dex wheels.E This 'rod fis carried by a xframe with two arms, one in the form of a' bell= crank lever 117, both -fulcrumed onv a rod 118'andE drawn -in one'difrection by a. spring 11S-attached@ one end to the other end of the bel-l crank"leverfand' at'its -other end 'to-'afsti'idf102lon the-shelf 8;l The fengagement of the--rodl 1116fwi'th the'indx wheels is 'aHfIictional engagement-sufficient toprevent accidental disengagement,- which requires 'the exercise of -little'rpoW-erto rotate the -train -of gearing. As the'fcolumn register -is'cleared by the-return movementofi' the'cari-iage,fthe trains of gearing-1ere turned and the 'indexlvvhee'lscam therod 1=16 -out (if-their paths.

In a construction-.such as :tfhepresentlwliere there" is no f-n-'ll stroke mechanismf acti-ng upon the down' stroke :of -t'he type key, there `is'the pcssifbilit-yo-flan incomplete operation.

'The operation' of th'e' key may-perform foneifo the two" opera-tions which iit should perform land the' dnminationfin'.1 which saifdf' mimside' plates? Zand 3i isupport'sf-a series 'of ten portion -124f=havin' lar n'l'meraltherepn and a depending port i' 125 'wliclrfisfstrucleby an ear 1,26 th'efcorresponding bar24ias it is 'actnatedlfbyi'fthef depression of the key.

The vnumeral4 on each sector 'corresponds with `the digital value of -thebar 24? withi which' that particn'larf'sectoris'r'assojci'ated. Each-t indic-atin'gf riiemtier.i is vprovided with a returning: spring 127 attached' at one`A end to the indicating 'memberfan'ciatfitsfother' end to aA r'd'128' inoun, ted-in''theJ vside' places Yol' the frame.' Tliese'fsprilrgsftiid tdraWz-'the' indicating 'members' nbririally; against a tstop rodV 129. Anotherrod the side plates supportsf. "aj sheetmetal member "131' which has-a-'portionbentaround said rod-and 'has a series of forwardly extending fingers 132 corresponding to the indieating members. The-freeendof eachi finger is'provided with a hook 133 which is adapted to hook over an ear 1341011 each indicator member 132 when the vlatter is operated. The member 131 has an npstanding arm -135 havinga slot 136 inf .which -is fastened one .end of aro'd 137, the'other end ofzwhich is at tachedz to thepa-W-l membei'46.

The operation-of this mechanism is as follows. lVhenever akey is depressed and the bar actuated, theea/r' 126 Wil'l =come `in contact with the depending tinger 125 of the indicator member l122 corresponding tojthe denomination of the actuated key. This fin-ger will, therefore, be moved rea-r- -Wardly'land'iif completely-actuated will reach thelposition; of theA rear inger'inv Figure 6. TWliile this operation-is taking. place, the movement of'the-bar 24T-has through the med-iatfoir of the camr-geari33 and-associated parts rocked the-pair] member 46, pulling rearwardly onithe :link 13?. This rocks the mem-ber- 131 onlfthe rod 130 andL lifts. the liookmember 133 upward, releasing' any indicator member2122', which .mayhave been Vsetipreviously. Itwill be remembered that if the key=is djepressedfar'enoughto-compfletely operate the computing mechanism, thepa'wl1nemberv46-will be released and returned to norn'ialposition before -the completionfof the down stroke otllthe 'key'. As soon as the'pawl member returnsto normal position, the rod 4137 Will be moved and the lingers; 132--moved' downward to al position Wherelth'e hook 133 will engage the ear 134 ofthe indicator member which -has just been 'm'oved'by the bar '24.- iVhen the key is released this -auXiliar-y indicator member which may be read through zin-opening 138'inr the top plate 14,* will'shoW--thenumber that has "been "entered in the* computing mechanism and the denominationin which it 'has been entered. However, ifthe depression of the key'hasnot been suliicient'tofvset'up the number in the computing mechanism and allow the pawlv member 46 to return to normal position, then the indicator member will move backwardas the key rises and the ear 134j will 'move forward before the hook 133 drops to a position t b detain the same. It may 'be not-ed'thaltion'ly oneA number shows at a-time in this'ar'i'x'i'liary indicating mecha nism bu-tlthat this isalways the Alast figure which" has'- been," set'up "in the computing mechanism.' Iftherefo're, the operator has made an error in depressing a key or has depressed a key insufiiciently, the fact is immediatelyapparent and the error may be corrected atlonce. Y

The register'is `caused to travel step by step -With the typewriter carriage when the latter is `in the computinfY zones by means of the following mechanism.

Attached to l the typewriter carriage is a pick-up dog 139 which is substantially the same as 'that of my prior application except thatit cannot be manually moved to released position. This-is adapted to engage a dctent 140 carried by ainember having a portion 141 lying in oneplane and a rack portion 142 lying in' a different plane (Figures 1 and 6). The portion 141 guided by a plate 143 attached te thefralne by screws and having a semicircular guide portion 144. To the top plate is adjnst'ably fastened a plat-e 45 by means of screws 146 and one end 147 thereof is adapted to enact with the cam of the pick-up deg. The other end 14S acts as a stop to limit themovemcnt of the deent 140 in one direction. The operation of these parts is obvious and substantiallyA the same as in my earlier application and need not be further described.' The plate 143 has a notch 14S) substantially opposite the position of the detent 140 when the register is in home position and this detent 14() isswiyeled on the bar 141 so that it canbe tnrned manually to engagethe'notch 149' and disengaged from the 'pickup dog 139; This construction allordshand relea'sable means fordisenga'ging'th'e adding' mechanismfrom' the carriage ofthe typewritingmachine.' i

The f rack l42 meshesfxvith 'the'ffearg1-5-0 (Figui-e515', e and 7.)' @wird by' a" 'ima "1541 supported at anan'gleof abont' 45 in. bear ing-brackets 152and 153.- The other 'end of the s haf 151 earries'a larger gear 154ivhich meshes with 'a'hraelfzl carried by the' register frame. Notwithstanding tliejact that the pick-np d og"1j3 9 engages the detent'fll() and canse'sjthel carriage and register to move together ,'througl1 'tlie. adding zonefs, itfis found desirable to. re'li`A e" the ofthe labor' of moving the "registerJ \'v nen "traveling step by Astep "in'fletter 'space `c lireetion'. AA spiral spring the;righ-t'i hand sideof theregister, passed 'aronnd a. Apnllevi157 'carried by; a sc reiv stud 158 snpported`by the' frame me'rnberfi'fand at'159 to the trail'elingfegister.

is attached In order t-o secure exact correspondence between the position o f thecarriage and that of the' register, the gear: 1 5( adjnstably j for the purpose" of, xvriting insaidf'grand application by means' including an ecentric Screw' 160 (Figure attaching 'the gear to a block held tothe shaft. A The eccentric is locked by set screw 161.

Since the register is spring dravvn toward the'leftit-is obvious that there must-be some means provided for holding these-.nie in the. righthand position when th'edetentf140 vand nick-up dog A139 are out of engagement. This is accomplished as follows. Monnted in rearward extensions of theframe plates- 2 and 4 is a rock shaft 162. Arms 163 snoportthereon a metal strip having a straight portion 164 anda spiral cain portion 165.

173', butl as'throllertravels alongzthe J the straight portion 164' thefshaft is merely f held against'return movement. A collar 16T on the shaft has an arm 166 for a purpose hereinafter setforth anda. spring 169 is connected at one end to this' arm and at the other end to a pin 170 carriedfby the register '.132

frame member 7. This spring serves to return the shaft 162 to theFignre 1 position when the carriage is again moved tothe leftand: the pin' 166 passes olf' the cam portion 165.

Another lcollar 171` on the shaft supports'a cam member172 having a ca m end 173 v(Fig'fnres 6 and 'A'bell crank'lever 174 fulcrumed'about 175 en tlie `trame 7 has' a roller 17carr'ied by one'armin positien to be engagedby tbe c am'll when the shaft- 162 is t'rned'. lheffirst'portion of the rotation of the shaft, therefore, rocks the lever '174,5' while 'theroller engages the cam straight portion cf'the member 172,A th'ele- 'ver receives no'frth'er movementi" A bracket 177 is fastnedby'a'scrivl178'tothe shaft 151 adjacent thegear 15 O and carries rproafj'positon to; bring the gran-d ota'lize'r into tfa'lig'er, certain 'sfthroiwn in to effective 'condition to' prevent theiwriting of -one arm 183 cfa bell cranli'lever'pivoted at @gasfin inni@ ine 184 to a bracket on the frame member 2 and having a downward arm 185 drawn in one direction by a spring 186 attached to a Stud 187 0n the frame. A stop` 188 limits the movement ofthe bell crank lever under. the influence of this spring. The arm 185 is connected bya link 189 to a .lever 190 p ivoted at 191 to a frame. This lever has a hook 192 normally underlying a lever 193 (Figure 3) pivoted at 194. "hen this hook moved out of engaging relation to the lever 193, the latter' moves counter-clockwise about its pivot due to the weight of the. longer arm thereof. A projection 1515v ou .said lever engages an arm 196l on a member 11)? (Figures Eland This' member 19T is loosely mounted on a sha-ft 198 pivoted in the fframe plates- 2 andf. A sheet metal plate or member 1-99 is wrapped about .the

l shaft and extends-upward so that its edge 200, normallyl lies just below the path of the. hars 24 as shown in Figure 6. A spring 201 (see Figure 5.) is ias-t .at o ne end to the plate 199 by aserew 202 andat-its other end bears against tliexnember197,' .the relation beingsuch'that-.the plate -and member move together in onedirection, but may yield during movement in the other direction. v

lYhen the column totalizer has moved to the left asfdscribed'and the leiter'. 193v has voperated the member 19T, .then :the edge of the,pl;1te 199 has. beeninove-dinto a path of .the bars 24.50 that-anactuation of any one .of these .bars will .canse-the downturned luglthereon to .engnge the plate and rock the. same together with the` member 197. This operates the :following-,devices A shaft 203v is mounted to turn in the frame plates 2 and 3 and has fast .thereon a plurality of sectors. 2,04 shown in Figures 2. 5 and-6. Each sector lies 'adjacent a lbar 2l and the right hand sector `has a rearward extension 205provided with a pin 206. A lever 207.has a U-shaped portion forming a wide bearing on the shaft 203. A' spring 208 hasone end hooked to the lever 207` is coiled around'the shaft 203. aud .has its other end engaging the pin 20G on the sector 204. The lever 207- is connected by a link 209 to themember 19'( so that when the latter is rocked, the lever 207 will also be rocked and the sectors 204 willl move, therefore, when andas long as they are free `to move. The spring 208 will permit the lever 207 to move .after movement of the sectors is stopped. A spring2l0` tends to return the sectors to normal position.

Each. sector204has a clearance slot 211 and all of `these slots-are. in line when the mechanism-is in normal position and eachperxnits passage of an offset lip 212 on the under edge of the associated bar 24. At about the middle of the series one of the soctols haspivoted thereto a link 213, the

other end of which is connected to a digit feeler pivotcd on the shaft 70. It may be noted here that in the present construction where only a single master wheelis involved, this digit feeler occupies substantially the. position of the second master wheel in my previous construction. Each sector 20-1 also has an offset portion 215 permitting the pas- Sage ofthe associated lip 212 when the sectoi-.has been moved to a certain position. 1f the ctor is moved to any other position, the lip 212 engages the same and stops the movement, ofthe bar 24 bcore the number represented by the depressed key has been set up in the totalizer- The offsets 215 are. ar ranged in sequence. iu the different .sectors as shown in Figure 2. The movement of the sectors is determined by the digit lfeeler 214 in. the following manner.

Each dial 4intermediate wheel Si' meshes with a-gear tooth 216 (Figures 3, 4 and {l} which has on one face thereof two pins 21T. The position voft-bese digit feeler gears 216 varies in accordance with the number appearingin the column totali'zer in the corr'. spendingdenominations. If the firstnamher Ato .be copiedis 5 andthe operator strikes the 5key, the endtooth 218v o thefdigit feeler will contact one of the pins 217 which of course will be about half-the motion from that-showninfull lines. i-n`Figure 9 'where thepins rest againstthe curved edge 219. which is the complete motion. and therefore thezero. position.- The 4sectors 204' will be moved'so that the Sector'corresponding to `the 5 key will have its votl'sejt- 215 in line with the .bar v2 4 which will move freely throughoutits full stroke, as thelip 212 will pass through the otset. After the lijp. h;1s passed through this offset, the end '31 of the' har 2l will slide oil the plate 200 ,and the plate with the connections to the ,sectors andthe .sectors themselves will all return .to normal position. On the ret-urn movement of the har 24 the lip 212-will pass through' the-normal vslot-211 in the sector.

But if .the number to l'u-.copied-is the feeler 214 will be stopped h v the pin 217 in the 5 position, and if the operator strikethe 6 key or any other key e .\'ce.p t`the the Sectors will not-he moved'to a position to bring the offset 215 on the sector corresponding to'this p art 24 in. line with the lip 212. AThe lip 212 will, therefore. contact with the sector and prevent complete' operation of the key. The parts are s o proportioned that this occurs when the key is deprwed about one-third of its normal depression. Thilo the. totalizer wheel has been operatedpartially, the release of the key will reverse the operation of said wheel and bring it hack to starting position. 'lhis operation is possible because of the absent-e of fullstroke mechanism on the. down stroke of the keys. It is ohjvious that it is iu'ipossihlc for the jur.-

operator to ivrite any number except that ap pearing in the:V column totalizer when the carriage is in position to write the sum and set'up the number in the grand totalizer.

4Moreover7 this 'mechanism operates to prevent writing of aigure in the incorrect denominational position. Suppose for example the highest amount to be copied is hundreds and the operator accidentally stops at the thousands position. The first figure to be written will be an integer but the totalizer wheel in' thousands position is standing at Zero and the key corresponding to the integer cannot vbe fully depressed; 'l

Having finished transcribingv the total which appears inthe column totalizer, which number is the only one that can be Written and set up in the grand totalizer at' this time, theregister is returned to and lockedin 'home'position 1 Just after' the register has reached home positiom thecolumn totalizer is' .cleared by the continued-movementfofthe carriagethrough mechanism 'about Ito be described and 'illustrated' particularly in Fig-v 'ures 3, 4`and 5i t -A shaft 219 is"mou'nteihhetween the si'd'c| frame members-f3 "and 4 and has loosely' mountedt-hereon gear' "lited'to a disc 22h' 'This disc-@hasf'pivoted #tof onen face thereoa pawl 2221normallyi'presse'd inf one at Vdiametrieally oppo'siteL points ada-'pt ed'. to cooperate' member is rigidnvith "a-c`am'f22o'."i

lingers 226which are Atied together by -a' rod 227 and properly spacedbygwashersf 225 Figure- 24)'. y 'f Thesei zro ""'fmg'ers are* in properposition-i to engagejthe projectionsv 217='o n the gears 2'16 When'thecolumn totalizeris-in home' or trightha'fndfposition. It is to be remembered lthat'these- 217 Aaire engagedby theizero `fingers onlyvvhenthe Eiumnf'tota'liz'e'r onthereturn movement'lof the A'carfriagej In 'such' case a iinge'r'-jpiece 238- I att'a'ched to AtheV lever 193' ispressed "dowm Which relat'ches 1eve'r'193'in hookf190 `which Wardly extendingp'art 229 'Whi'elris 'engaged bythe Vcam 225- whent Vthe latter 'is rotated, When this cam is rotated the zero finge-rs are all -moved from 'ull -line to dotted line vpsitionof Figure 3.' 'In this movement one or the other of the pins;217 is'engaged by veither the end 'or the eurvedportion 230 of the'zero vfingers'aud thesegears arecammed to'zero at the same?tim'ereturnmg the' position,` totalizerfwheelsto zero; ':-It will'bevrememf beredthat the lock gearf lev'ers are. all -released at thisftiuie nd''thattherod- 116' is cammed out of holding'engagement by the rotation of the trainsiof ggjearilig#4 When the zero :fingers are -fullyv operated .as shown in dotted lines in Figure 3, the curved surface.vk

23(1,contactswith thetwo projections 217 and prevents overthrowY or' ,back lash move#A 234 moimte'd'fon :i stud 235. then'io'vel ment is'ne'arIj completed;fal projection' 236:

on'th'e'b'ai 232 contacts'witlr'a bent'ea-r'237 wieviele psw-1 22e; r This' frames ment. Ay spring 231 attached to an ear of the depending part 229 and. to the stud 120 tends to return the parts to normal position.

The gear 220 is given its return movenient in the following manner. described7 when the register moves to the left, the lever 193 is released and one end As has been thereof drops.'K This end of the lever nor'- :to bring the register to home position, a continued movement thereof operates the 'gear 220 in' 'the 'following manner'. 168 on' the 'shaft '162 which is rotated 'by the' return movement of the carriageis at? To the arm tached abat 232 .having rack teeth 233 onv one end to engage' the gear 220. Anendwise' movement of tliebar 232 therefore rotat es" tlie 4 gear 220 vvhichfhas been clutched, 'f -with the ca m`225 as describedfandthe rotat-ion'fthe' latter operates 'the' zero lingers inf'theA 'manner' above set forth.v ,The freev end ofthe' bar232is Ysupported .by @roller obtained 'by one-half a v"re' volution of" tlie gear '220' 'and associated parts.

rally mov'e'jtheearriagefar enough to th'e `left 1 to bring the v'grandi totalizer into operative "f 'position Without desiringto clear the-"col"- vice since each'v 'in connection with thefdeseription `of'the structure thereof; It is 'to he noted thatthe 'pitulate"in detail'the operation of the de# 'i 'feature has` been'eztplained' `invention provides Aa simple and efiicientv v means forpe'rforming the character.. of work which 1t rsqdesired to carry out'andthat practically all chance of error' has' been avoidedso'far asis possible this character.- 1

During' the Writing bill and setting them up in thecolumn to- 'talzerg the.' auxiliary indicatinglineehanism v 1 in devices of shows al any time ,the last digit which Ehas been registered in thetotalizerand the dc- IlQiiiination in wliicliit has been entered is indicated bry the position ot' the totalizer. A uyerror which occurs at this time may be quickly corrected without dztlicult.

As soon as the ,various .items ave been written and the carriage is moved to a position to write thesuni and set up the total inthe grand totalizer, mechanism is thrown into :position which prevents the inaccurate copying of the total appearing in the column register. There is no necessity at this ,time furthe use of anyadd or subtract :lever Yor. special key of any character. The error check mechanism comesinto position automatically upon movement oi vthe carriageand register into ,the lgreni'd .totalizenzones `After the sum is fwrittenfzthevcarriage is returnedto starting position for the purpose of Vwriting a succeedingbill and the column register is automatically cleared. Nol manipulation of any key or :thought ontlie part ofthe operator ,is necessaryto attain this result. Infact ,it maybe notedithat the add and subtract key isoiily used for three purposes; to correct. an inaccurate entry in the column .t0talizer, tov enter fa credit Aitem in the columntotalizer andto clear the=graud totalizer when.desiredv Y -Figures 11, 12'a'i1d; zshow.; a .modified` forni offer-.rer c heckmechanism .in whichgnif stead .of lstopping an incorrectkey-.on the down 'stroke .and preiientingzthe entry..o f -a number in the .register tlie key .permitted to .move freely .on i135 downgstroke and write the incorrect number, .but is prevented from return movement.. operator will, 4 therefore, know that Aanerror hasbeen .madeandl correct the same at once. Man-y parts of the mechanism are the saline-.astin-the previous modification and. only. those, which are different or are necessary for za.clear .under-- standing of this .form afie`slioyvn liguizes.

A rock traine 239 -is mounted on 'in .these 2l() which is'pivoted in "the: .frame plates- 2. and 3 and this frame is normally drawn in-z one direction by a spring-241. The endsfof' the sliding bars 24 normal-ly Contact with. said Jocking frame at all .tiniesso that the frame is moved each time-a key is depressed. 'lhe spring 2-11, therefore, acts as aietunii spring for all of .the .sliding bars 24 andthe train of mechanism connected thereto.

lVhen the lever 193 is released from its latch exactly as iii .the previous' construction, its ciid drops not only its own weight but also because of the tension of'aspring 242. Since this lever Aperforms inore work i-nthis forni of the device than in the other, -it is found advisable to add this. spring-The downward-ly moving en d of `the lever'193 engage: an arm 243 .of a bell crank lever pivoted at :244cm a bracket 245 carried by noa-usic ,c

the traine plaie 2)'. 'l`hc depending ariii 246 of this bell crank 4lever has a rounded .end lying between the sides o f a U-shaped bearing 247 of a crank 248 which is slidable on the shaft 240. This -crank has a jaw 249 (see Figure l2) which engages the rock frame 239 when said crank is .moved to the left. 'lhereafter the frame 239 and the crank 248 will iiiove togetherwhenever the frame is rocked by the depression of a niiineral key. It is to be .remembered that .at this time the grand totalizer is in the computing zone.

A coil spring 250 Within which liesa stop plunger 251 connects the upper end of the su locking sectors 204 of theother modification and. these sectors together with the crank 1252 .are .positioned o'n 4the sha-ft 255, being spacethby collars and -held rigidly by -nuts ateach side thereof. This shaft- (see Figure 12)' 1s mounted between the .sideplates 2 and-3 to allow endwise movement for throwing .into and out of engagement purposes. The-side movement of this shaft with all its sectors Ais controlled entirely by the 'lever 25'?,,which is connected by a wire link-256 .to .bell crank-lever246 and in this lway the' tivo,pa'r ts will 'always move together, but

'in opposite direction. That is to say lwhen the jaw .249 on the ,lever 246 is disconnected -fromihe rock frame 2239, the rock shaft 255 with all its locking sectors mounted thereon is also in the disengaged position which 'in this .case .is the extreme left hand position .as shown'- vin Figure 12.

IThe digit feeler 214 is substantially iin- -changed and is-connected by link 213 to-one of the sectors 254. It is, however, now

-mounted Sto slide the extent o-.one'spacc' on -its shaft and in order to preserve -it noi'- finally incorrect .alineiiient it is drawn to the .night by a spring- 258 attached thereto and-to the frame plate 3. It is stopped and :aligned iii this position 'by a sheet metal -braclet 259vcai'ried byfthe frame member 11.

'Elied-isconiiect key 260 is pivoted lat :261 and has a-lnk. 262 connecting it to the elcment 6G (Figure 5) so that when theregister is "in home oi.' extreme right hand position --tlie same' result is produced as by the de.-

pression of the disconnect lever by hand, and the error check mechanism does not af- :fect the depression of the numeral keys.

Pivoted on a bracket 263 is abell crank lever. -one arm 264 'of whicli'projects outavarttly through opening in tlieyfraine member 3: and underlies the disconnect vkey lever.

'.The other arml 265 extends downwardly and bears against the cam '253, which is also fast on fthe shaft 255` and therefore moves the-sectors to inactive position.

` of the 'parts The operation of this modification'may be described -briey as follows. When items are being written and entered in the column totalizer, the rocking `frame' 239- is disconnectedfrom theerror 4cheek mechanism and the projections 267 on the slide bars 24 move freelyto the right of the lock sectors. As soon las the grand totalizer is brought to the computing .zone and the lever 193 released as-before described, thebell crank pivoted at 244 is operated to effect a lateral as well as'a. rotative-.connection between the -1ockino'"=frame239'and the lock sectors 254 carried by the shaft 255. The 4depression of any numeral key will now oscillate the sha-ft 255 and-operate the digit' eeler as before. If.thedigitrfee1er sfstopped early in its movement, lthe spring 250 will permit the .continued movement of the rocking frame 239. If the correct key is operated,

this projection 267 will pass through-'the corresponding slot in the lock sector 254 and returnl therethrough without interference.' However, if an incorrect key is depressed, the projection 267 will not meet a slot in the corresponding lock sector-and the inclined face 268 of this projection will engage the side of the lock sector and cam 'it to the left against they spring 242,thus

allowing the continued movement of the slide bar 24 and consequently a complete depression of the kev lever. Assnnn as ne `projection 267 has passed the lock sector upon the downward movement of the key, the spring 242 will immediately return the lock sector to its right hand position and on the return movement of the slide bar the straight fac-e 269 of the projection 267 will engage the lock sector and prevent return movement of the bar 24 and consequently prevent return movement ot the' depressed kev.

7lhc attention of the operator is thus called to the fac-t that an e|ror"l\as been made. To release the depressed key it is merely necessary to press the disconnect lever which acting upon the arm 264 of the bell crank lever causes earn 253, thereby moving the'shaft 255 and all of the lock sectors-to the left sufficiently to release the projection267 from the lock sector which has held it against return movement, The depressed key is therefore the other arm 265 to engagethe permitted 'to return to normal position and the error may be corrected at=oncei `When the lever 193 is rocked in the opposite directiomwhich rocking movement is producedexactly l'as in the first' modification and as .fully described above, the upward movement of the extension" 266 vengaging` under the arm 243 of the bell crank lever will move the 'arm 246 ot this" lever in'such manner-as to disengage the jaw 249 fromt-heframe 239 and thus break the connection; between this' frame and the"locking'sectors. and also -shift them to the left. l f

It is desirable toprovide additional means for accurately 'a'lining the :register wheels especially [during an extended vautomatic carrying operation. One feature-lof'- A'the present-invention is the provision of an additional falining': gearil and cooperating pawl for this purpose. This also allows considerable extra clearance in' .the manu actureof the register gears since'lthis alin ing 'mechanism will 'pick up -all A lost motion and in effect reduces the number of wheels that arevcarried in 'al single train of mechanism'.'.'if'

-Deviccs intended for' this purpose are shown in Figures 14and :115. "1he'constr'uction involves relatively few changes in the form previously7 Adescribed `and none whateverrin'the .train ofgearing including the master wheel-orthe master wheel pawl. The return spring 271 for the master wheel pawl is somewhat diierently located. 'The same plate which supports the master wheel pawl pivot shaft 45 andthe shaft itself are extended and an'auxiliary ali'ning pawl 272 is mounted on said shaft. The bent portion. 273 of the plate 44 preserves the pawls in proper relation to each other.

An auxiliary alinng gear 274 is mounted on a shaft 275 'which vsupports the master wheel and spacing'collars 276 preserve the proper relation of these parts. This auxiliary wheel' 274 -is exactly the same as the master wheel and engages a wheel in the register located several spaces to the left of the wheel engaged by the master wheel. N rmally the pawl v272 is drawn away from the gears 274 by `means of a spring 276 but is limited in 'its movement under the influence of this spring by thc engagement ot an offset car 277 on the pawl with a pin 278 carried by a frame member.

The crank arm 279 on the rock shaft 54 corresponds 'generally to the arm 56 in the construction previously described and has a pin or roller 57 cooperating with the tail of the pawl 46 inthe same manner. The crank arm 279 is, however, extended further than 'is' the arm 56 and carries a second pinor roller 280 extending to a position to coact with the'tail 281 of the auxiliary pawl 272. It is noted that the crank arm 2 79 with the engaging members 57 and 280 is loca-ted between the tails of 'the -two epawls for reasons which n-'ill-beunderstood from a'description of 'the operation. n

Figures 14 and l5 show the parts 1n normal relation with the pawl 46 engagmv the master'wheel 75 and the auxiliary paw 272 out of cngagementiwith the auxiliary wheel 274'. Upon the 'down stroke of the l-key the cam 38 engages =the rocking member 55,

thereby rocking the pin 57 against the tail of the master wheel 1pm-vi 46 and moving the pa-wl -out of engagement with the master wheel. :it this time there is :no operation on the auxiliary -pawl 279. As soon as the cam 88 disengages the mem'ber 55, the latter snaps bac-l: to position under the influence et its returning spring und the pin 280 will strike against the tail 281 of the :pawl 272 with -suicicnt force to throwit intocnvage- -hient with the :uzxiiiary alining wheel 27;!

:1nd -i-hus properly( aline the gears. This takes place just before the complete-depression or' the key. .\s soon vas the key starts to rise, the cam 38 again engages the =mem :her and -rocksit in thelopposite direction n-the normal action of the prtsor with their fusual construction...

"The -various results above described are obtained .in each case by ,simple and- -compact mechanism which requiressubstantially no attention on the part :ofthe operator-.ex- :cept the manipulation of the proper numeral keys and tbe-return of -.the carriage. fIt is. obvious that punts of-.the mecha-nismmay be employed .with devices of otherwise widely differentcharactcr and that various detail changes'fmay be made ivithoutin any -Way departingr .from the spi-rit of theilrvention, which is to be regarded as-liinited only by the -s:opc.. o f the appended claims.

l claim as my invention: i

1. A computing mechanismcomprising u tsmelling:totalizer7 means -for -setting up n number thereinfand mea-ns for=oleafring said totalizcr Aonly after its return movement.

2. A computing mechanism comprising a travelling:Y -totalizer, -means `for sett-ing up .a number therein.l means for advancing said totalizer beyond its zone of computation, und means Afor ciearing,r said totalizer only after-its return movement from -said adtvanced position.

LA computing-meclmnism comprising,y u column Vtotalizer,` agranditotalizer, means for setting up a-numberinreither 'totalizer, and automatic means for clearing the column totalizer after a number has been set up in the grand tota-lizer.

4. A computing mechanism comprising a column totaiizer, -a 'grand totalizer, means for setting 'up -a number in either totalizer, und means for-clearing the column tctaiizer only after it-s=return movement from a position where the grand totalizer has been positioned lin its eifectve zone.

A computing `mechanism comprising a column totalizer, a vOfrand totalizer, means 'msetting up n. nunilxer in either totulizer, means for-clearing the column totalizer only after its return movement from a position where the grand totalizer has been positioned in its effective zonefand manual means 'for disabling said clearing means.

A computing mechanism comprising :l plurality of travelling.totalizcrst means mzsetting up a numberrineither totalizer, and means or-'automatically clearing one tote*- izer .only :after'ithe.-other totalizer .has been in its fcfe'dtive zone. l.'

7. A computingnnchanism:comprising u pi u rarity 'ofj travelling -tota|li9iers, means for setting up aanmierfinfeither totalizer-,fmee'ns for' automatically clearingone totaiaerv only afterthe' oth'cxjtotulizerfhas: been in' its effec-V tivezzonefantl means ttor' disabling said clearingmeans. 'A l 8; .A- Acornputixnq mechanism comprising' a c olmnn `tota'lizer,means or setting.: up a number: therein '.when' the itotlzer isili computingA zone,;- -means' .fior t:advancingv the totalizerito-another nonef and meansorv returningsaidfotalizerztrlomeposition-and automatiealLyf-iearingsthesame.

column -totmlizer, means -for setting -up a' number therein-.when=theftotalizerf1s m comllo for .advancing-fthe column 'totalizer-pastits computing zone to' set up a number in thc grund -totu'lizer, :means =for returning the totalizers -tolhome position and` means for thereafter-:automutically clearing the coiumn totalizer. f

11. A combined ftype'writing 'and computing mechanism com rising a travelling carriageliaving a to an frofmovement, a travelling ftot-a'lizer, means Afor setting up a number 1n the totalizer, and'means for clearing the -totulzer by -the return movement or the carriage. 

